Circuit-interrupter for jump-spark coils.



PATENTED JUNE 21, 1904.

0. H. FISCHER. GIRGUIT INTERRUPTBR FOR JUMP SPARK GOILS.

APPLIOATION FILED APR. 11, 1904.

N0 MODEL.

Wit/2e 'sses: W

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UNITED STATES Patented June 21, 1904.

PATENT OFFICE.

CIRCUIT-INTERRUPTER FOR JUMP-SPARK COILS.

SPECIFICATION forming part of Letters Patent No. 762,993, dated June 21,1904.

Application filed April 11, 1904- To all whom, it may concern:

Be it known that I, CHARLEs HARRY FISCHER, a citizen of the UnitedStates, residing at Cincinnati, in the county of Hamilton and State ofOhio, have invented certain new and useful Improvements in Circuit-Interrupters for Jump-Spark Coils, of which the following is aspecification.

My invention relates to circuit-interrupters for jump-spark coils, andhas for its object the providing of a device of the character mentionedin which the vibratory mechanism is capable of very delicate adjustmentand firm positioning after adjustment without destroying the adjustment;and the invention will be readily understood from the followingdescription and claims and from the drawings, in which latter Figure 1is a perspective view of my improved device. Fig. 2 is a longitudinalcentral vertical section of the same, partly broken away. Fig. 3 is arear view of the front end of the case. i Fig. 4 is a perspective viewof the bracket and slitted thimble for the tensionscrew of thearmature-spring. Fig. 5 is a perspective view of the yoke and slittedthimble for the contact-screw of the armaturespring. Fig. 6 is aperspective view of the armature-spring; and Fig. 7 is a detail insection on the line in of Fig. 2, showing the armature-spring-securingmeans.

My circuit-interrupter is applicable for use in connection withjump-spark plugs used on explosive-engines-such, for instance, as thegasolene or other explosive engines on automobiles. In automobiles thecircuit interrupter is in practice usually placed in an almostinaccessible position, as under the seat or other place inconvenient foradjustment thereof, and the adjustments required of the armature-springare delicate ones for creating a spark in the spark-plug of justsufficient intensity and regularity to ignite instantly and unfailinglythe explosive charge supplied to the explosion-chamber of the motor, theelectric energy supplied to the circuit-interrupter varying at differenttimes, owing to degrees of energy in the battery, speed of motor, orother conditions, the armature-spring of the circuit-interrupterrequiring consequent fre- Serial N0. 20 2,629. (No model.)

quent changes of adjustments. In my improved device I have providedmeans by which these adjustments can be accurately and delicately madeand firmly secured after being made without disturbance thereof and bywhich these adjustments can be readily made when the circuit-interrupteris in inconvenient locations and also while the mechanism is subjectedto the jarring caused by the engine in operation, the adjustments beingso arranged that they can be made and clamped without the employment oftools.

A represents the case or box, in which an electromagnet B, condenser C,and secondary coils D D are located.

E E are the posts to which the wires 0 (1, communicating with thesparkplug, (not shown,) are secured. ires (5 0 connect the coils D I)with the posts E E. Suitable primary electric conductors ff areconnected with the posts F F from any suitable source of electricenergya battery, for instance. An electric conductor f connects the postF with a shank g of a support Cr of a spring H.

I is a yoke or bracket having threaded shanks 2' 7", taking throughapertures into the inside of the box and acting as posts for electricconductors.

One end, I, of the primary coil K of the electromagnet connects with thepost F,while the other end, 7r, thereof connects with the post 11,inducing magnetism in the core 5 of the magnet, which takes into anopening a in the case. An electric conductor 0 connects the post 2 withone end of the condenser, and an electric conductor 0 connects the otherend of the condenser with the post 7. A wire (I takes about the rubbertube (Z and connects the coils D D.

The spring-support G is composed of two parts g connected by screws g",the spring having apertures it 71 therein. into which pins on thesupport take, the pins being preferably secured to the part r/ andprojecting through the apertures into sockets g on the part The supporthas lugs g taking into sockets a in the case for positioning thesupport. A bracket L extends from the support, having on it a sleeve M,provided with internal threads m and exter- IOO nal threads in andhaving a tapered end m The sleeve or bushing is provided withlongitudinal slits m" for dividing it into a plurality of sections orleaves and providing space between the sections for permitting the freeends of the sections to be drawn radially toward each other. A screw Nscrews into the internally-threaded sleeve, the end thereof takingthrough an aperture it in the spring and having collars n n securedthereto at either side of the spring. A nut O has internal threads 0 andan internally-tapered portion 0, forming a compression-ring forcompressing the sections of the sleeve about the screw and firmlysecuring the screw within the sleeve without danger of shifting theposition of the screw in doing so. The construction is such that arotatively-stationary and radially-movable clamping part is interposedbetween the rotating clamping-nut O and the screw N. The object of thescrew N is to provide tension on the spring H.

The yoke I has thereon a sleeve P, having internal threads 9, externalthreads p, and a tapered end 19 It is provided with slits p for dividingthe sleeve into a plurality of sections or leaves, the free ends ofwhich are adapted to be clamped radially against a screw Q.

R is a nut having internal threads and an internally-tapered part 1*,forming a clamping-ring which rides on the tapered end 19 for forcingthe sections of the sleeve P radially toward and clamping the same uponthe screw Q without danger of shifting the adjusted position of thescrew by reason of the fact that a rotatively-stationary clamping partis interposed between the rotating nut and screw. The screw Q,preferably takes against a contact-knob 72 on the spring H.

The screw Q is an adjusting-screw for regulating the distance betweenthe armature 7L3, secured to the spring, and the end of the core of themagnet, the adjusting-screws N and Q regulating the tension of thespring and the distance of the armature if from the pole of the magnetto a nicety and the clamping means described clamping the screws inposition without danger of shifting the same in clamping. The sleeves Mand P may be parts of the bracket L and yoke I, respectively.

When the parts in the inside of the box have been located and the properconnections made, the inside of the box is filled with paraflin or thelike. My construction also permits me to use large clamping-nuts whichare easily moved to clamped or non-clamped position in inconvenientlocations without the use of tools and without'disturbance of adjustmentof the screws.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

1. In a circuit-interrupter for jump-spark coils, the combination, withan electromagnet and vibrator-spring, of an adj usting-screw for saidspring, an externally-threaded part, a nut taking about said screw andscrewing on said externally-threaded part, and a radially-movableclamping part interposed between said screw and nut, saidradially-movable clamping part and nut collectively having engagingfaces between the same acting to move said interposed part radiallytoward said screw for clamping-said screw in adjusted position.

2. In a circuit-interrupter for jump-spark coils, the combination withan electromagnet and armature-spring, a support to which said spring issecured, said support having a bracket extending therefrom, anexternally and internally threaded sleeve on said bracket, said sleevebeing slitted for forming clampingleaves, a tension-screw in said sleeveand secured longitudinally to said spring, a nut taking over 'saidsleeve, said clamping leaves and nut collectively having inclined faceand engaging face therefor for clamping said leaves against said screw,substantially as described.

3. In a circuit-interrupter for jump-spark coils, the combination, withan electromagnet and vibrator-spring, of an internally and externallythreaded slitted sleeve having a tapered end, an adjusting-screw forsaid spring screwing in said sleeve, and a nut screwing over saidsleeve, said nut having an inner face taking against said tapered endfor clamping said screw in said sleeve, substantially as described.

4.. Ina circuit-interrupter for jump-spark coils, the combination, withthe case, electromagnet and armature-spring, of a pair of internally andexternally threaded sleeves rigidly secured on said case, said sleevesbeing slitted for forming clamping-leaves, a tensionscrew securedlongitudinally to said spring and screwing in one of said sleeves, anarmature-positioning screw screwing into the other of said sleeves, anut screwing over each of said sleeves, each of said sleeves and its nutcollectively having an inclined face and engaging face therefor forclamping said leaves toward said screw by the turning of said nut,substantially as described.

In testimony whereof I have signed my name hereto in the presence of twosubscribing witnesses.

CHARLES HARRY FISCHER.

Witnesses:

HERBERT F. HARDEN, 7M. H. SCHMIDT.

